SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             ----------------------
                                            
                                   F O R M 6-K

       REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934

                           For the month of July 2005

                                 RADVISION LTD.
                              (Name of Registrant)

               24 Raoul Wallenberg Street, Tel Aviv 69719, Israel
                     (Address of Principal Executive Office)

                  Indicate by check mark whether the registrant files or will
file annual reports under cover of Form 20-F or Form 40-F.

                           Form 20-F [X]    Form 40-F [ ]

                  Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): [ ]

                  Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): [ ]

                  Indicate by check mark whether by furnishing the information
contained in this Form, the registrant is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under the Securities
Exchange Act of 1934.

                                 Yes [ ] No [X]

                  If "Yes" is marked, indicate below the file number assigned to
the registrant in connection with Rule 12g3-2(b): 82-____________








                                 RADVision Ltd.

6-K Items

     1.   Press Release re  RADVISION's  SIP Toolkit Used by Net-2Com to Develop
          Innovative  Wireless/IP  Phones and IP Centrex  System  dated July 11,
          2005.

     2.   Press  Release  re  RADVISION's  SCOPIA(TM)  Gateway  Powers  Vodafone
          Portugal's 3G Contact Center dated July 14, 2005.

     3.   Press Release re Aethra Enriches its Video Communication Product Range
          With Complete End-to-End Solutions dated July 19, 2005.

     4.   Press Release re Edith Cowan  University Joins  Broadreach,  RADVISION
          and  Microsoft  to  Create  a World  Leading,  Real-Time,  Rich  Media
          Collaboration System for Students and Lecturers dated July 20, 2005.

     5.   Press   Release   re   RADVISION   Releases   Version   2.5   of   Its
          Industry-Leading SIP Server Platform dated July 27, 2005.







                                                                          ITEM 1






Press Release                                             Source: RADVISION LTD.

RADVISION's SIP Toolkit Used by Net-2Com to Develop Innovative Wireless/IP
Phones and IP Centrex System

Monday July 11, 7:00 am ET

FAIR LAWN, N.J.--(BUSINESS WIRE)--July 11, 2005--RADVISION (Nasdaq:RVSN - News)
today announced that Net-2Com Corporation has used RADVISION's award-winning SIP
Toolkit to develop its new WiPCom1000 wireless Internet Protocol (IP) telephone
as well as its SubCentrex IP-Centrex carrier-class softswitch.

Net-2Com uses a proprietary voice over IP (VoIP) technology to develop and
distribute innovative VoIP and networking-related products for enterprise
environments. Its WiPCom1000 is a unique wireless/IP phone that features
built-in wireless LAN (WLAN) functionality, allowing it to be used automatically
in public WLANs.

The SubCentrex carrier-class softswitch is an IP-Centrex enterprise solution
that supports the conversion between Session Initiated Protocol (SIP) and the
H.323 protocol, enabling end-to-end IP telephony between public switched
telephone network (PSTN) users.

"By selecting the RADVISION SIP Toolkit, we realized immediate benefits, ranging
from direct access to an up-to-date communication protocol to unparalleled
development flexibility made possible by the multiple API layers," commented
Kiyoshi Oh, CEO of Net-2Com. "With RADVISION's SIP Toolkit, our development team
was able to focus on service functions rather than protocol and interoperability
details, which directly resulted in faster service rollout and lower costs."

RADVISION's SIP Toolkit is a high-performance SIP implementation that provides
multiple application program interface (API) layers for optimal control and
flexibility when developing new products and services. Designed from the ground
up to be a powerful and highly versatile set of development tools, it addresses
and simplifies the development of communications systems and devices based on
SIP. Users of the SIP Toolkit can be confident that it complies with the latest
IETF SIP specifications as well as key extensions.

"Net-2Com's use of our SIP Toolkit underscores the toolkit's flexibility as well
as its ability to speed development of high-performance, standard-compliant
products, ranging from IP phones to softswitches to multimedia servers and
gateways," said Adi Paz, Sr. Director of Product Management and Marketing for
RADVISION's Technology Business Unit. "We are pleased to be selected by Net-2Com
because their business model represents cutting-edge development as well as a
commitment to high-quality, reliable products and services. This matches well
with what RADVISION has to offer."

Because it selected the RADVISION SIP Toolkit, Net-2Com was able to quickly
support a wide variety of IP services, including one-number service and
presence/instant messaging (IM). In addition, selecting the industry-leading
RADVISION development environment will allow Net-2Com engineers to continuously
improve their product functionality and respond to customer-driven needs as they
move through their product roadmaps. By taking advantage of the lower-level APIs
available in the SIP Toolkit, Net-2Com engineers could enable the SubCentrex
softswitch to handle sub-standard or older generation VoIP devices, providing a
competitive advantage in terms of strong compatibility and interoperability with
existing infrastructure and devices.

About RADVISION Developer Solutions

RADVISION's complete range of developer solutions, consisting of protocol
toolkits and platforms, embedded frameworks, professional services, and
automated testing tools, is designed based on a thorough comprehension of the
developer's needs. Our goal is to enable shorter time to market of robust,
standards-compliant rich media applications. With the largest customer base in
the industry and a long-standing record of market leadership, RADVISION provides
a unique package of award-winning technology, accumulated experience, and
established expertise. RADVISION developer solutions address the full
development cycle for rich media products, services, and solutions over the
entire range of communication infrastructures (Broadband, 3G, WiFi, and WiMax).







About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high 
quality, scalable and easy-to-use products and technologies for
videoconferencing, video telephony, and the development of converged voice, 
video and data over IP and 3G networks. For more information please visit our 
website at www.radvision.com.
                                                 
About Net-2Com Corporation

Net-2Com Corporation markets network products based on proprietary VoIP
technology and provides solutions for enterprise-based environments and
telecommunication service providers. Main products are IP-Centrex, IP-PBX,
wireless IP phones, etc. For more information, please see:
http://www.net-2com.com/

This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Revenue from
sales of RADVISION toolkits may have been recognized in prior quarters.
Stockholders and other readers are cautioned not to place undue reliance on
these forward-looking statements, which speak only as of the date on which they
are made. We undertake no obligation to update publicly or revise any
forward-looking statement.


------------------

Contact:
     RADVISION 
     Tsipi Kagan, 201-689-6340 
     cfo@radvision.com 
     or 
     Adi Paz, +972-3-767-9636 
     adip@radvision.com 
     or 
     Investor Relations: 
     Comm-Partners LLC
     June Filingeri, 203-972-0186 
     junefil@optonline.net







                                                                          ITEM 2







Press Release                                                  Source: RADVISION

RADVISION's SCOPIA(TM) Gateway Powers Vodafone Portugal's 3G Contact Center

Thursday July 14, 7:00 am ET

COLLAB's One Contact Solution, Using RADVISION's SCOPIA 3G Video Services
Platform, Is Powering Next-generation Contact Centers

FAIR LAWN, N.J. & LISBON, Portugal--(BUSINESS WIRE)--July 14, 2005--RADVISION
(Nasdaq: RVSN - News) and COLLAB today announced that the RADVISION SCOPIA 3G
video gateway is being used by COLLAB in its 3G Contact Center solution, which 
was selected by Vodafone Portugal to enable next generation voice, video, and
instant messaging services. The RADVISION SCOPIA gateway connects 3G subscribers
to COLLAB's One Contact contact center solution in real-time video calls.

The COLLAB One Contact Solution is an Internet Protocol (IP)-based product that
offers full multimedia contact management, including routing and call
distribution. Built on the robust Session Initiated Protocol (SIP) standard, the
One Contact Solution works with existing gateways and media servers. By using
the COLLAB product, carriers are able to provide customers with video calling
between 3G wireless phones and/or wireline IP videophones.

"The SCOPIA 3G Video Services Platform allowed us to quickly develop our contact
center with confidence," said Pedro Quintas, CEO of COLLAB. "The RADVISION
product is distinguished by its ability to generate high-quality video services
as well as its interoperability with any communication protocol. These features
translate into a competitive advantage for us, and subsequently, for our
customers, such as Vodafone Portugal."

RADVISION's SCOPIA 3G Gateway seamlessly bridges video calls between 3G-324M
enabled mobile video phones, PDAs or laptops and IP-based video end points (SIP
and H.323).

"SCOPIA is an excellent match for Vodafone Portugal," observed Eli Doron, Chief
Technology Officer from RADVISION, "because it provides a scalable platform that
can easily grow as new capabilities and subscribers are added. RADVISION SCOPIA
can be integrated with the existing infrastructure of the operator to enable a
cost effective delivery of innovative revenue generating video services."

Focused on industry-leading customer service, Vodafone Portugal is the second
largest operator in the Portuguese Telecommunications market, and part of the
Vodafone Group, one of the world's largest mobile telecommunications companies.

About RADVISION Carrier Solutions

RADVISION has a twelve year track record in pioneering multimedia communications
and conferencing solutions for the services provider market - both IP wireline
and more recently broadband wireless. The company offers infrastructure,
developer toolkits, and professional services for equipment developers and
service providers to develop and/or offer their customers a wide variety of
high-revenue multimedia solutions and services including: IP telephony,
point-to-point and multipoint video telephony, wireless to landline (IP) video
connectivity services, group video chats and videoconferencing, residential
video telephony, broadband remote surveillance/monitoring, 3G video streaming
and video mail connectivity.





About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high 
quality, scalable and easy-to-use products and technologies for 
videoconferencing, video telephony, and the development of converged voice, 
video and data over IP and 3G networks. For more information please visit our
website at www.radvision.com.
                                         
About Collab

Anticipating a technology revolution in the industry with the widespread
adoption of Internet Telephony, in 2003 COLLAB started developing 3G contact
center solutions specifically targeted to Wireless Operators and Network Service
Providers. COLLAB has built a robust IP telephony platform for managing customer
interactions seamlessly across all media including voice, video and instant
messaging. To learn more about COLLAB and its solutions, go to www.collab.pt.

This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

RADVISION noted that proceeds from the transaction were recognized in prior
quarters.

-----------------

Contact:
     RADVISION 
     Tsipi Kagan, 201-689-6340 
     cfo@radvision.com 
     or 
     Lior Zadicareo, +972-3-776-9650 
     liorz@radvision.com 
     or
     Investors:
     Comm-Partners LLC
     June Filingeri, 203-972-0186
     junefil@optonline.net
     or
     COLLAB
     Manuel Beja, (+351) 210 927 840
     manuel.beja@novabase.pt






                                                                          ITEM 3






Press Release                                             Source: RADVISION LTD.

Aethra Enriches its Video  Communication  Product Range With Complete End-to-End
Solutions

Tuesday July 19, 7:00 am ET

AETHRA and RADVISION Sign New Agreement to Significantly Expand Relationship and
Embark on New Era of Collaboration 

ANCONA, Italy & FAIR LAWN, N.J.--(BUSINESS WIRE)--July 19, 2005--AETHRA(R) SpA, 
a leader in the global telecommunications market, announced today that it has 
broadened its range of video communication products to include powerful 
infrastructure solutions. This new AETHRA strategy is supported by the 
technological partnership with RADVISION (Nasdaq:RVSN - News), the industry's 
leading provider of high quality, scalable and easy to use products and 
technologies for videoconferencing, video telephony, and the development of 
converged voice, video and data over IP and 3G networks.

AETHRA now offers a complete range of hardware/software ISDN and IP interactive
tools, which include MCUs (Multipoint Conferencing Units) with full video/audio
transcoding and SIP/H.323 support; ISDN Gateways for seamless connectivity
between different networks and standards; Gatekeeper functionality for call
control and dial plan schemes; and Scheduling & Management capabilities for the
videoconferencing network infrastructure including network elements and
endpoints.

"Thanks to the new products included in our offering, it is possible to overcome
the multi-communication challenge in any business environment such as distance
learning, as well as in the personal desktop environment", says Marco Viezzoli,
AETHRA SpA CEO. "Our product range now encompasses easy-to-use, real time
communications in all videoconferencing scenarios. Our goal is to link people
worldwide, using sophisticated, high quality videoconferencing systems as well
as PC or desktop videoconferencing solutions."

"RADVISION has partnered with AETHRA to provide crucial infrastructure
components for effective multipoint visual communications over any network, said
Gadi Tamari, RADVISION's CEO. "The combination of AETHRA's high-quality
endpoints with RADVISION's IP infrastructure and software application expertise
sets the stage for best of breed end-to-end video conferencing solutions for any
enterprise business environment."

The wide range of AETHRA video conferencing solutions (including videophones,
set-top systems, roll-about as well as distance learning, video surveillance and
telemedicine solutions) together with a new series of MCUs (Multipoint
Conferencing Units) developed by RADVISION for AETHRA, enables up to 12 sites to
concurrently communicate from anywhere in the world.

Now offering H.235 encryption for highly secure video connections as well as
additional features including H.239 for adaptive multi-viewing of data and best
video quality on all networks, AETHRA is positioned as a leading player in the
visual communications market.

About AETHRA

AETHRA (www.aethra.com) is a leader in the global telecommunications market,
with distribution of its leading-edge products through businesses and more than
40 telephone companies in over 60 countries worldwide. The company develops,
manufactures and markets a wide range of high-performance video communications
and audio conferencing products, including rollabouts, set-tops, videophones and
special solutions dedicated to telemedicine, video surveillance and distance
learning. In addition, AETHRA offers multi-audio, video and data services thanks
to AETHRA.net, the company specifically focused on multi-conferencing services.
AETHRA also develops and markets internationally a variety of telecommunications
products, including ISDN and xDSL systems and networking test equipment. These
exceptional products have distinguished AETHRA as a leader in the
telecommunications industry worldwide for over 30 years, reflecting its
expertise in bringing cutting-edge communications technologies to the market.






About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high 
quality, scalable and easy-to-use products and technologies for 
videoconferencing, video telephony, and the development of converged voice, 
video and data over IP and 3G networks. For more information please visit our 
website at www.radvision.com.
                                        
This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Revenue from
sales of RADVISION toolkits may have been recognized in prior quarters.
Stockholders and other readers are cautioned not to place undue reliance on
these forward-looking statements, which speak only as of the date on which they
are made. We undertake no obligation to update publicly or revise any
forward-looking statement.


-------------------

Contact:
     Press:
     RADVISION
     Bob Romano, 512-328-4617
     rromano@radvision.com
     or
     Corporate:
     Tsipi Kagan, 201-689-6340
     cfo@radvision.com
     or
     AETHRA SpA
     Roberto Giamagli, +39 071 2189718
     r.giamagli@aethra.com
     or
     Press:
     Francesca Galeazzi, +39 071 2189742
     francesca.galeazzi@aethra.com







                                                                          ITEM 4






Press Release                                                  Source: RADVISION

Edith Cowan  University  Joins  Broadreach,  RADVISION and Microsoft to Create a
World  Leading,  Real-Time,  Rich Media  Collaboration  System for  Students and
Lecturers

Wednesday July 20, 8:15 am ET

SYDNEY, Australia & FAIR LAWN, N.J.--(BUSINESS WIRE)--July 20, 2005--

Broadreach Services, RADVISION and Microsoft deliver one of three worldwide
systems working across voice, video and data on a single integrated
videoconferencing network anytime, anywhere

Broadreach Services, a leading systems integrator and distributor of visual
collaboration products in Australia, and RADVISION (Nasdaq: RVSN - News), the
source of award winning, industry-standard products and technology for real-time
voice and video communications over IP, have announced the implementation of a
visual communications platform for Perth's Edith Cowan University (ECU).

ECU's five faculties have three metropolitan campuses and one regional campus
200 kilometers south of Perth. Implemented in December 2004, ECU's 23,000
students are connected with the most advanced technology available today and
with an interface that is most inviting and usable.

"These tools have allowed us to work collaboratively at an optimal level by
seeing and talking to each other. Real outcomes are the result of people
collaborating with people," said Jeff Murray, Director Knowledge and IT Service
Centre, Edith Cowan University.

"ECU's vision was clear -- connectivity for teachers and students allowing
real-time video conferencing from a student's laptop anywhere and anytime," said
Shaun Wormald, Broadreach Services Managing Director. Broadreach has
represented, marketed and implemented RADVISION voice and video communications
solutions for the last six years in Australia.

Today, the network provides visual and audio communications services to students
and staff throughout the ECU network. Better communication is achieved because
teachers are allocated time slots for face-to-face webcam discussions with
groups or individuals.

What makes this installation especially significant is that ECU has leveraged
RADVISION's support of SIP within its products to roll out desktop visual
communications solutions using Microsoft Office Live Communications Server to
staff and student computers/laptops network-wide.

"Edith Cowan University has combined an integrated communications solution that
demonstrates our shared vision of delivering secure, scalable, real-time
productivity tools including instant messenging, voice, video and data that
empower staff and students to become more effective in teaching, learning and
research," said Oscar Trimboli ANZ Real Time Collaboration Business Manager at
Microsoft. "The combination of Broadreach Services, RADVISION and Microsoft has
enabled Edith Cowan University to share and collaborate on projects, information
and ideas with virtually anyone, anytime, from anywhere and on any device."

Staff and students can access the technology from home or via the internet using
firewall traversal technology implemented by Broadreach Services. "Ultimately,
what we have created is a fully integrated collaborative solution that enables
any device to connect from anywhere in the world" said Mr. Murray.







Previously, the university was able to videoconference only to another
videoconferencing unit. Voice conferencing was only possible from a telephone to
another telephone or mobile phone. With the Broadreach/RADVISION solution, it is
now possible to easily connect into a video conference or a desktop webcam
conference.

"Education has long been one of the most enthusiastic adopters of visual
communications technology as there is no substitute for eye contact and visual
communications - whether the teacher is in the same location as his or her
students or a thousand miles away," said Eitan Livne, General Manager of
RADVISION, Asia Pacific.

"ECU's video conferencing system is a critical technology underpinning teaching
and learning operations. The RADVISION solution has allowed the university to
cost effectively extend the capabilities of video conferencing usage, while
providing new features that will enhance teaching, learning and collaboration
across our campus communities," concluded Mr. Murray.

Broadreach undertook comprehensive project management that involved extensive
planning, risk management, video application network testing prior to
implementation and successful migration to production.

"The ECU team has always been very thorough in project preparation and has a
very good understanding of the applications, technology and the desired
educational outcomes required by educators and students. This makes our life
much easier in ensuring expectations are met for all stakeholders and the
project is a success," said Mr. Wormald.

Solutions diagram available on request.

SOLUTIONS SUMMARY:

    Broadreach Services - Business analysis and integrator 
    RADVISION - Conferencing Platform with IM First integration 
    Jasomi Networks - Peerpoint for LCS 
    Starbak - Video streaming and recording 
    Web cams 
    Microsoft Office Live Communications Server(TM)
    Microsoft Office Communicator 2005

About Broadreach Services Pty Ltd

Broadreach Services specialises in the provision of a comprehensive range of
solutions, products and services in the area of voice, video, data and web
conferencing, streaming media and delivery over private IP networks, 3G or the
Internet while still allowing an orderly integration with traditional ISDN video
networks.

Our vision is to ensure IP based visual communications and collaboration is easy
and ubiquitous, thereby ensuring a real value proposition for people, business
and government is realised. With the convergence of voice, video, data and web
conferencing services, the range of skills required to effectively design and
support Internet Protocol (IP) conferencing systems with other networking
components has grown significantly. Broadreach has the track record, resources,
products and skills to provide comprehensive solutions, services and support in
this market sector. Go to www.broadreachservices.com

About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high
quality, scalable and easy-to-use products and technologies for
videoconferencing, video telephony, and the development of converged voice, 
video and data over IP and 3G networks








RADVISION offers one of the broadest and most complete sets of video, voice, and
data conferencing network solutions for IP and ISDN-based networks, supporting
the majority of end points in the market today. The RADVISION solution features
powerful multipoint conferencing units (MCUs), scalable H.323, SIP, 3G and ISDN
gateways and gatekeepers, and easy-to-use management and scheduling tools for
the IT manager and end user. RADVISION also provides businesses and service
providers with integrated solutions that deliver converged IP-based video
telephony applications to employee computer desktops and residential broadband
homes worldwide. Go to www.radvision.com.

About Edith Cowan University

A market leader in education for the service professions, Edith Cowan University
(ECU) is located in Perth, Western Australia. The University's international
enrolments exceed 3,000 with students originating from more than 80 countries.

ECU's origins go back to 1902 when it began as a teaching college. Today it is
Western Australia's second largest university with approximately 23,000
students.

The University has three metropolitan campuses in Churchlands, Mount Lawley and
Joondalup and a regional campus in Bunbury, a city 200kms south of Perth. More
than 330 courses are offered through the five faculties. Go to www.ecu.edu.au/.

Issued by Rivers of Communication on behalf of Broadreach Services

This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

--------------------

Contact:
     RADVISION
     Tsipi Kagan, 201-689-6340
     cfo@radvision.com
     or
     Bob Romano, 512-328-4617
     rromano@radvision.com
     or
     Broadreach Services
     Shaun Wormald, +61 2 8270 1000
     or
     Rivers of Communication
     Dolores Diez, +61 3 9572 4552
     dolores@riversofcom.com
     






                                                                          ITEM 5






Press Release                                             Source: RADVISION LTD.

RADVISION Releases Version 2.5 of Its Industry-Leading SIP Server Platform

Wednesday July 27, 7:00 am ET

Version 2.5 of RADVISION's Award-Winning SIP Server Platform Offers to SIP
Server Application Developers Extended Capabilities for Developing the Latest
Feature-Rich Products 

FAIR LAWN, N.J.--(BUSINESS WIRE)--July 27, 2005--RADVISION (Nasdaq:RVSN - News) 
today announced the availability of Version 2.5 of the RADVISION Session
Initiation Protocol (SIP) Server Platform. Immediately available to RADVISION
customers around the world, the new release of the award-winning platform offers
significantly broader capabilities--interfacing to external databases as well as
enabling the development of presence servers and events packages.

Based on RADVISION's market proven SIP Toolkit, the new release is a powerful,
standards compliant, and highly versatile set of development tools that provides
fast time to market for SIP application development. "The enhanced SIP Server
Platform allows our customers to realize significant competitive advantages,"
said Adi Paz, Sr. Director of Product Management and Marketing for RADVISION's
Technology Business Unit, "because it simplifies the process of including new,
value-added capabilities in SIP server applications."

Version 2.5 implements all of the necessary building blocks required for
presence server and events package applications, as well as call establishment.
These include the SUBSCRIBE/NOTIFY mechanism and presence message format, Winfo,
PUBLISH, and XML encoding/decoding.

In many cases, the latest SIP servers need to interface to external databases,
such as a security database or a location database. Version 2.5 of the RADVISION
SIP Toolkit is enhanced with a Lightweight Directory Access Protocol (LDAP)
client interface with H.350.4 schema (RFC 3944), as well as the ability to
customize and build other schema for locating databases.

New features in Version 2.5 of the RADVISION SIP Toolkit include:

     o    LDAP client - an interface for external databases.
     o    PUBLISH handling - support for presence clients that publish their new
          presence state.
     o    Support for session  timer RFC 4028 for 3G networks,  which  defines a
          way for the server to continually track an existing session.
     o    Support for general  Uniform  Resource  Identifiers  (URIs)  including
          telephone, presence and instant messaging (IM).
     o    Numerous enhancements to existing features including Back-To-Back User
          Agent (B2BUA)  client side,  authentication,  XML parser,  application
          program interfaces (APIs), and more.
     o    High  availability  API - ability  to store the state of an active SIP
          server and restore it on another SIP server.

Compliant with the latest IETF SIP specifications and key extensions, the
RADVISION SIP Server Platform is a high performance SIP implementation and
provides multiple API layers for optimal control and flexibility when developing
innovative products and services. It is well suited for developing proxy
servers, presence servers, general events servers, B2BUAs, registrars, redirect
servers, soft switches, call session control functions (CSCFs), IP-PBX, and
application servers (including conference servers, instant messaging chat rooms,
third-party control servers).








Availability

Version 2.5 of the RADVISION SIP Server Platform is available immediately
worldwide.

About RADVISION Software Development Products

RADVISION's award-winning protocol toolkits and platforms are the core
technology containing rich sets of APIs to enable software engineers to simplify
development of all types of VoIP applications and services. As the core
technology for IP-based application development, the protocol toolkits and
platforms are always up-to-date with the latest industry standards and
thoroughly tested for interoperability with leading OEMs. Whether the
application needs to support single or multiple protocols, RADVISION's developer
products provide the most comprehensive suite of VoIP protocol stacks including
SIP, MGCP, 3G-324M, H.323, MEGACO/H.248, RTP/RTCP, and RTSP.

About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high
quality, scalable and easy-to-use products and technologies for
videoconferencing, video telephony, and the development of converged voice,
video and data over IP and 3G networks. For more information please visit our
website at www.radvision.com.
                                        
This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Revenue from
sales of RADVISION toolkits may have been recognized in prior quarters.
Stockholders and other readers are cautioned not to place undue reliance on
these forward-looking statements, which speak only as of the date on which they
are made. We undertake no obligation to update publicly or revise any
forward-looking statement.

-----------------------

Contact:
     Corporate:
     RADVISION
     Tsipi Kagan, 201-689-6340 
     cfo@radvision.com 
     or 
     Adi Paz, +972-3-767-9636 
     adip@radvision.com 
     or 
     Investor Relations:
     Comm-Partners LLC
     June Filingeri, 203-972-0186
     junefil@optonline.net











                                   SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                               RADVISION LTD.
                                  (Registrant)



                               By /s/Arnold Taragin
                                  -----------------
                                  Arnold Taragin
                                  Corporate Vice President and General Counsel



Date:  July 29, 2005